Improvement in shutter-workers



NPETCR8. PHOTO-LITHOGRAPHER, WASHINGTON. D. C

sited tapes' @mutation Leners Paca No. 109,661, 1aed November A29, 1870@narrated November 19, 1870.

IMPROVEMENT IN SHUTTERWORKERS.

The schedule rex-enea to in these Lerteraratent and makingpart of chesame.

I, CHARLES A. lo'r'rniuot the city and county of Providence, State ot'Rhode Island, have invented -a new and improved Blind andShutter-Adjuster, 'ot which the following,r is a specilcation.

l am aware thatmuch time has bceiremployed in the endeavor to make somemechanical contrivanee by which a. blind o r shutter can be opened orclosed. trom the inside Ofa room without raising the window, bntthoseinvented heretofore have never come .into general use by reason of thecost OF constructing and applying them. j

The great utility ot' any invention which would ae- `conrplish theresult required, and atthe saine time be so made as to be inexpensive,readily suggests itself.

.lhe danger oi' children and aged persons falling` from the window inattempting to close blinds and shutters, as at present fastened, is verygreat, especially when the. wind is blowing miOnthe shutters.

lhe nature oi" my invention for opening or shutting ablind is acombination ot'levers so acting upon cach other as to turn the objectattached to one of them half-way round when a i'orce is applied to theOther, carrying it either backward or ibrward.

Said levels are the fixed lever A, to which the blind or shutter isfastened, the t'ulcrum-lmr 13, and the level' (l, to which the power isapplied, and having at one end a stud or hook which works into a slot inlever A.

In the accompanying drawing- Figure l shows the position ot' my.adjuster when the blind is closed, `the parts A, B, and U ot' the atl--justcr, the manner ot' attaching 4the blind to the arm or lever, and themanner ot' applying the force to the adjuster by means ot' a spindle,Gr,with .a screw on one end working in a tubular nut, T. The course oi`the levers is also indicated by the dott-ed lines and arrows.

v Figure 2 shows the position of the adjuster when the blind is opened,and also the various parts, and theeourse which the levers travel inclosing the blind or shutter.

Figure 3, a front or edge view ofthe adjuster'.

Figure 4, the inet-allie socket, within whichworks the head of the nut,keeping -it in place.

Figure 5, the washer, within which works the spindle, keeping it inplace while traveling backward and forward.

The parts oi' my invention are the arm or lever A, with two projectionsat one end, at right angles to each other, X and Y,vso made as to claspthe two sides of the blind or shutter.

Through one ot' the projections a hole is made, 'through which andthrough theblind a.A bolt is insorted, as an easy mode ot' attachingtl1em, as at 7.

The arm or lever A has a-small round hole near the angle of theprojections, 1, and an elongated hole, 2, running nearly the remaininglength -of the arm. Thus are made the surtacesupon which act one ot' theother f.

levers, as hereinafter described. l

Y An arm or level', B, a' little curved, with a'hook at each end, andnear one end a broad, flattened surface, forming a rest for the spindleor rod transmitting. the power which acts upon the lever nextdescribed., and is more fully shown hereafter.

.An arm or lever, O, similar` to A, save that there are no projections,and to the other end of the arm there is lattached a hook.

ihe holes through the arin are similarly shaped to those ot A, the smallround one, 3, serving furthe insertion of the hook on the end of B, nearthe flattened surface, and the other, 4, for the insertion of andworking therein ot' thetooth of-the spindle.

The three parts oi' my invention are made of mah. cable iron, this beingtougher than cast-iron, and are molded complete and ready to puttogether after a little liling. rlhey are put together thus:

Holding the lever C in one hand, with the hook up, and taking Binthe`other hand, with the hook up, bring the hook nearest the. flattenedsurface to the under side of and tothe small hole in the arm or lever C,and insert it by raising the arm until the hook enters the hole, then`holding the two arms one above the other, so that the hooks will beexactly in-line. Take the lever A in the other hand, and insert the hookOi B in the small hole of A, and the hook of C in the large hole of A,raising the levers as before un`- til the hooks entertheholes, then letthem come back to their position. j l

My little device is then iu working order.

l use hooks for holdingthe levers together, both from their smallexpense as well as the ease with which they are' put together.

To put my adjuster in operation, we must bore a hole of proper sizethrough the side of the building,

in the proper place, and ii'orn the inside We insert the tubular nut T,withinwhich two threads of a screw have -been cast, and over the end ofthis nut we place the socket E, and then attach tol the end ofthetubular nut the crank F; from the outside ofthe building- .we insertthe spindle G, upon one end ot' which a thread, fitting into that ot'the nut, has been cast, into thetubular mit and through the washer K.

To the blind or shutter we now attach our little device by theprojections or ears X and Y, either by screws vor by putting a bolt andscrews through one of the earsand the blind or shutter', or in someother way seeurelyfasteuing the lever A to the blind; then place theblind in position, closed, and bring the tooth H of the spindle into theslot or hole in' lever O.

Now my adjuster is in working order, and ready to do its work o fopening or closing the blind. l

W'e now turn the'crank upon the inside ofthe building, turning it fromleft4 toward the right; this turns the tubular nut in the samedirection, and draws the spindle in o the sameV and toward ns; thespindle acting upon he lever or arm C draws that toward ns, and beingpulled back, the hook thereof slides in the elongated opening in A,pulling the arm Ain the saine direction until all the arms are in aposition, one above the other, which brings the blind half-way open, orrather the arm A, to which the blind is securely at tached, has so movedas to canse the rim of the blind to describe a quarter-circle.`

A continued turning of the crank exerts a like and 4continued force uponG, and causes the hook now turned by the curved end of the slot in A,markcd', to retravel that cavity, and draws the arm or lever A around;another quarter-circle is described by the rim of the blind, which isnowthrown back against thc side of the house.

'lhe opening in A must be of' just the right dimensions for Vthe properworking of the head or hook of the arm G.

The oiice of the arm B is to keep theother two levers or arms in properposition and j ust at the right distance apart, but so fitted byitshooks in the small holes in A and O as to allow those levers to workfreely-and easily about these hooks.

The blind or shutter now being open, we make one turn of the crank, andthe threads of the screw and v nut are brought closely together, andthe'frietion holds them tightly and secures the blind against the winds.

it out and forward, and the spindle pushing the arml C, carrying itforward; and the hook traveling the slot in A carries the arm A aroundtill all the arms are in position, one above the other; a continuedforce applied to C, carrying it forward,l causes the hook to work uponthe other side of' the slot, and carries the arm A around till the armsA and C are at right angles to each other, and the arm B extending fromthe extremities of the arms, forming, as it were, the hypothennse of theangle formed by the arms A and G.

lhe blind being closed, we make another turn of the crank, and the saineis closed securely, as before, so that it cannot easily be pulled openfrom the ontside.

Claim.

Y What I claim as my invention, and desire to secure by Letters Patent,is

The fixed lever A, the fulcruin-bar B with a hook or stud at each end,and the lever C, all combined as set forth, and for the purpose ot'working a blind or shutter.

CHARLES A. POTTER.

fitncsscs J. EnAs'rUs Lnsrnn, HENRY fl. CONANT.

